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Flex Frame Vehicle from ATAC, Army Tank Automotive Center now TACOM, in 1961-62 had double coil spring joint and hydraulic drive to each wheel. No restriction is provided in roll. Pitch and yaw are limited. Bekker at the same time built 6 wheeled non driven prototypes fitted with an elastic frame that allowed restricted freedom in pitch and roll. Pict from Journal of Terramechnics, 1970, Vol7, N°1, Pergamon Press, Elsevier
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Flex-Frame Vehicle showing coil springs bethween two bodies. Pict from Journal of Terramechnics, 1970, Vol7, N°1, Pergamon Press, Elsevier
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Molab of General Motors cross-country 6x6 lunar articulated scale model vehicle in the 60s . The full-size prototype by GM for Boeing was under NASA contract. The well-known M. G. Bekker was the main conceptor. Pict from Journal of Terramechanics, 1974, Vol 11, N° 2, Pergamon Press, Elsevier.
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Test of Bekker 6x6 lunar vehicle in the 60s. The flexible chassis allows to get up or down large obstacles. Pict from Journal of Terramechanics, 1974, Vol 11, N° 2, Pergamon Press, Elsevier.
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Off-road locomotion
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